The Model View ViewModel (MVVM) is an architectural pattern used in software engineering that originated from Microsoft as a specialization of the presentation model design pattern introduced by Martin Fowler.

learn more… | top users | synonyms

2
votes
3answers
57 views

How to maintain view-related information in MVVM and may I store this in the model?

I have an ongoing discussion with some colleagues on how to manage the views to our model. We've got a model which may be represented by many views. Let's say we've got some data that is stored in an ...
1
vote
1answer
40 views

Queue of jobs in a different states and with different services around

I need to design a 'queue' of jobs (in a a very much UI oriented application) that can be run by a user and I need some other thoughts to pick optimal approach from ground up. My jobs can be in a ...
0
votes
0answers
26 views

Encapsulate multiple properties into a single class to use as a custom DependencyProperty

My application is a WPF project implemented in C# .NET (4.5) using an MVVM architecture with no code-behind in the View. In order to eliminate the coupling between the View and the ViewModel I'm ...
1
vote
0answers
33 views

Is it improper to have an application wide source for dropdown binding

The WPF Combobox needs to bind a collection to it's ItemsSource and something to bind the selected item or value to. Until now, I've included both the collection and the selected value properties that ...
0
votes
0answers
173 views

What's the best way to expose a Model object in a ViewModel?

In a WPF MVVM application, I exposed my model object into my viewModel by creating an instance of Model class (which cause dependency) into ViewModel. Instead of creating separate VM properties, I ...
1
vote
0answers
84 views

Best Practice Method for Including Images in a DataGrid using MVVM

All, I have a WPF DataGrid. This DataGrid shows files ready for compilation and should also show the progress of my compiler as it compiles the files. The format of the DataGrid is Image|File ...
2
votes
0answers
96 views

MVVM - Master Detail interaction scenarios - Implementing when MasterVm has partial data, and Detail has to pull whole entity

I've been doing MVVM in a vacuum, working by self on issues most of the time. My main source of inspiration is of course the internet, and I do quite allot of research and often find answer to design ...
3
votes
2answers
70 views

What is better to return from the DataService: Status or Exceptions?

I have a MVVM app with DataServices (using mvvmlight). Right now, i'm using it like var answer = await myDataService.PullList(categoryId); if (answer.Status == Ok) ...
0
votes
0answers
47 views

How to use data shaped by the UI from the ViewModel while keeping concerns separated?

I'm coming from a winforms background and trying to get ahold of MVVM and XAML. Right now I'm wondering how I can take advantage from a data-shaping control (either native or provided by a third ...
0
votes
0answers
72 views

WPF Control Lifeycle and Navigating through Containers to set Focus

I wanted to understand a control's lifecycle in WPF. Let me explain my scenario: I have a complex screen containing various container controls hosting forms. Let's say my screen has 3 Accordion ...
0
votes
1answer
127 views

Again MVVM / MVP story , passing interface of a view to its view model why it is bad?

I have used WPF for an Enterprise solution (hundreds views heavily used Data inputs and validation) in MVP pattern (it was a clean solution usually small amount of code behind forms and main code was ...
0
votes
3answers
385 views

What is the main goal of MVVM pattern? [closed]

Could you tell me what is the goal of the MVVM pattern? What are the arguments or the reasons I can give to a team and product owner to respect and develop according to this pattern? I would like a ...
0
votes
0answers
23 views

Create a subclass of model for class-based viewmodel creation

Is it justified to create a model subclass just for creation of appropriate viewmodel based on this class. Am I missing something? How to pass data about model into viewmodel?
0
votes
0answers
67 views

Inputs and outputs to a method mixed in the UI

I am designing the front end of an WPF application using MVVM where basically all we are doing (for now) is calling a method with some inputs and displaying the outputs. There are two types of ...
1
vote
1answer
199 views

How to create a WinForms project that is “WPF-ready”

I'm a C# developer who hasn't had the privilege of learning WPF yet. However, I recently initiated the architecture phase of a new project which I expect will eventually employ WPF (probably; although ...
1
vote
4answers
228 views

In MV* pattern where does non-business model goes?

I am passing Menu items to View from ViewModel. My menu definition is a model with properties title, image, hasChildren and isEnabled. But this model is meant for UI unlike business domain models like ...
0
votes
0answers
165 views

Should you implement a repository pattern with an MVVM javascript framework?

When coding a MVVM pattern I use Dependency Injection (DI) and try and code against interfaces. One of the common patterns is a Repository pattern, so I can swap my data storage provider. If I'm ...
0
votes
0answers
50 views

MVVM / API design: who is responsible for what in the example inside?

Note: this question is about the MVVM pattern in general and not related to any specific MVVM framework. I am wondering what the best design approach for the requirements below is (hypothetical ...
-1
votes
1answer
975 views

Where do put INotifyPropertyChanged Interface in Model or ViewModel [closed]

I am new to MVVM pattern I have a window which has 3 text boxes namely Name,Address,Description ,a save button and a listview which displays the above fields Name,Address,Description respectively ...
0
votes
2answers
311 views

Model and ViewModel for View

I am new to the MVVM pattern. I have a window which has 3 text boxes (Name, Address, Description), a save button, and a listview which displays the above fields. When the save button is clicked I want ...
1
vote
2answers
232 views

I know the language but still can't code like other peers [closed]

I have moved to a new job and code base (been doing C#, .NET, Windows Forms, etc. for last four years) and I have been on this for three months until today. During these three months I caught up with ...
1
vote
1answer
124 views

Where does non-MVVM code belong in an MVVM app?

By non-MVVM code, I mean things like highly generalized components, like one with common extension methods for CLR types, and other 'homeless' helper classes etc? I have a Core project that most ...
2
votes
3answers
487 views

Should IoC container be part of portable library?

I am seeing the benefits of Portable Class Libraries for centralizing Models and ViewModels to a single code-base. Where should dependency injection management (IoC container) take place, though? My ...
3
votes
1answer
285 views

Loose Coupling Presenter to View in MVP

We work in a Java shop here and our web application uses an implementation of the MVP architectural pattern. Our manager comes from a .NET world, where he has been exposed to the MVVM design pattern. ...
4
votes
1answer
906 views

Help with complex MVVM (multiple views)

I need help creating view models for the following scenario: Deep, hierarchical data Multiple views for the same set of data Each view is a single, dynamically-changing view, based on the active ...
3
votes
1answer
131 views

When is it okay to reassign the model for a view in MVC?

Is it ever really acceptable to reassign the model for a view in MVC? (Or MV* where applicable.) In other words, for a single view instance, is it ever ok to reassign the view's model? That is, as ...
0
votes
1answer
173 views

What shoud MainWindow of a WPF contains

I am making a WPF application following MVVM model. I have seen some approaches for applying MVVM. I am concerned about my MainWindow.xaml. In some tutorials I have seen that MainWindow is only ...
1
vote
1answer
261 views

Syncing objects from code with the view in WPF

I've been reading some into it, but I am time pressed, so I would require a simple solution now and I promise to read up on it later. I come from a winforms c# background, and have lately been working ...
3
votes
2answers
684 views

Is a 'God' ViewModel desired in WPF

My application has user controls within user controls. Please see a screen shot of one of the most beautiful applications of all time (UC = user control): All the properties live in the MainWindow ...
0
votes
0answers
286 views

wpf and mvvm printing report startegy

I am developing a WPF application and I need some clarity on printing in WPF and MVVM (I am using MVVM-Light). I want to create standard looking reports for my application and I don't want to have to ...
1
vote
3answers
1k views

MVVM and service pattern

I'm building a WPF application using the MVVM pattern. Right now, my viewmodels calls the service layer to retrieve models (how is not relevant to the viewmodel) and convert them to viewmodels. I'm ...
2
votes
1answer
144 views

Sub routing in a SPA site

I have a SPA site that I'm working on, I have a requirement that you can have subroutes for a page view model. Im currently using this 'pattern' for the site MyApp.FooViewModel = MyApp.define({ ...
7
votes
3answers
6k views

What the best way to wire up Entity Framework database context (model) to ViewModel in MVVM WPF?

As in the question above: What the best way to wire up Entity Framework database model (context) to viewModel in MVVM (WPF)? I am learning MVVM pattern in WPF, alot of examples shows how to implement ...
2
votes
2answers
255 views

When using MVVM, should you create new viewmodels, or swap out the models?

Say I have a viewmodel like this: public class EmployeeViewModel { private EmployeeModel _model; public Color BackgroundColor { get; set; } public Name { get { return ...
0
votes
3answers
1k views

MVVM application architecture, where to put dependency injection configuration class, BusinessLayer and Common interfaces?

Planning my architecture for an MVVM application I come to this: MyApp.UI View MyApp.BusinessLayer ViewModel MyApp.DataAccessLayer RepositoryImplEF MyApp.DomainLayer DomainObject ...
-1
votes
1answer
174 views

Converting between data and presentation types

I'm quite new to stuff like DI, MVVM and WPF altogether, so it's fairly possible this reads like a giant WTF... I have defined an interface in my business layer, ISomeEntity; then in my data layer, I ...
6
votes
4answers
747 views

Clean, Modular Code vs MV* Frameworks [closed]

I've been hearing a-lot about the "new" MV* frameworks. I've tinkered with KnockoutJS, creating an invoicing application, but I much prefer to write clean, modular code in raw JavaScript - leveraging ...
2
votes
5answers
4k views

MVVM ViewModel and Commands

I need a bit of help to understand the relationship between a viewmodel and a command, and the responsibility of the viewmodel. I'll try to give an example (using Caliburn Micro). I have a viewmodel ...
3
votes
2answers
263 views

Should Item Grouping/Filter be in the ViewModel or View layer?

I'm in a situation where I have a list of items that need to be displayed depending on their properties. What I'm unsure of is where is the best place to put the filtering/grouping logic of the ...
0
votes
2answers
2k views

MVVM pattern - Best design approach to manage an application

One year ago, I discovered the WPF technology and I developed a little application, as first experiment, to compare the content of two different directories. The content of each directory is shown in ...
4
votes
1answer
1k views

Value of MVVM in a Line of Business Application (and a Rant of Current Development Practices)

After 2 years, I'm still struggling with MVVM as a practical method of producing working software. In some cases it's great. I did a multithreaded application that controlled a small assembly line ...
8
votes
2answers
4k views

Is MVVM in WPF outdated? [closed]

I'm currently trying to get my head round MVVM for WPF - I don't mean get my head round the concept, but around the actual nuts and bolts of doing anything that is further off the beaten track than ...
1
vote
1answer
340 views

Checklist for coding MVVM web application [duplicate]

We are a small team working on a web application using MVVM design pattern using technologies like .NET, Knockout and HTML. I am trying to come up with a code review checklist for this, so that my ...
1
vote
2answers
202 views

Why DependencyProperties and not native language support?

With advent of WPF and MVVM Microsoft introduced DependencyProperties and INotifyPropertyChange interface to provide a way to implement the "reactive" approach used with those technologies. Sadly ...
4
votes
2answers
533 views

Should MVVM ViewModel inject an HTML template for default view?

I'm working on web application design that includes Knockout.js and have an overall MVVM question: Does it make sense for the ViewModel to automatically inject a default HTML template (pulled from ...
0
votes
2answers
250 views

What is this variation of MVC in JavaScript?

I am working on sorting out my Javascript code. Currently I have views implemented without any Model or collection. Now I working on separating Model from View. So for this transformation, I am ...
1
vote
2answers
429 views

Should code-behind in WPF be considered part of the view?

I've read plenty of articles around different patterns in use with WPF and this is something I've yet to understand: should a code-behind file be considered part of the view? As a consequence, should ...
7
votes
3answers
1k views

MVVM Clarification

We are about to write our first WPF application and are becoming familiar with the MVVM pattern. We've built many Winform applications and have an architecture that has been very successful for us. ...
3
votes
3answers
2k views

How to organize MVVM files in solution

I'm fairly new to the MVVM concept but like a lot of the flexibility it gives me so far. However, I'm struggling to find a good way to manage my code. I have several classes that are just sitting in ...
4
votes
2answers
463 views

WCF service as a proxy for publishing real-time data to a WPF/MVVM clients

I've been tasked with creating a dashboard application to show real time updates for our servers. The raw data comes in from an XML file on our intranet which I need to parse and present to the user. ...